An Efficient Mixed Signal Circuit to Find the Weighted Sum of Digital Current Signals

Finding the weighted sum of voltage signals is straight forward and the method is well known. But finding the weighted sum of current signals is unfortunately not so simple. And the situation gets more complicated when the value of the current signals are only available in digital form. There are purely digital and purely analog methods to address this problem, but both have its own limitations. This paper presents a median method to solve this problem which overcomes the limitations of the pure methods.